| Core Identity |
| Developer | Adysseus | Mustafa Tolga DALBUDAK | ZipoApps | Cider Software LLC | Webtoweb | Rome Rock LLC | Webtoweb | Calculated Industries | MobArts | Cider Software LLC |
| Category | Productivity | Utilities | Utilities | Utilities | Tools | Utilities | Tools | Utilities | Utilities | Utilities |
| Platform | Android, iOS | iOS, Android | iOS, Android | iOS | Android | Android, iOS | Android, iOS | Android, iOS | iOS | iOS |
| Store Metrics |
| Rating | 4.8 / 5 | 0.0 / 5 | 4.6 / 5 | 4.7 / 5 | 4.5 / 5 | 4.7 / 5 | 1.8 / 5 | 4.9 / 5 | 4.8 / 5 | 4.8 / 5 |
| Ratings Count | 1,215 | 0 | 1,142 | 265 | 2,687 | 967 | 5 | 4,036 | 3,095 | 2,033 |
| Price | Free | Free | Free | $2.99 | Free | Free | $3.99 | Free | Free | $9.99 |
| Release Date | Jul 4, 2016 | Nov 5, 2022 | Feb 24, 2012 | Nov 20, 2013 | Dec 6, 2018 | Mar 6, 2018 | Feb 6, 2024 | Sep 8, 2010 | Apr 13, 2011 | Dec 26, 2013 |
| Last Updated | Aug 2, 2024 | Feb 18, 2023 | Apr 9, 2025 | Aug 16, 2024 | Jan 7, 2026 | Oct 31, 2023 | Jun 11, 2024 | Jan 31, 2026 | Feb 28, 2026 | Mar 22, 2026 |
| Sentiment & Reviews |
| Sentiment | positive | positive | - | excellent | positive | positive | positive | positive | - | positive |
| Score | 82/100 | 85/100 | - | 85/100 | 85/100 | 75/100 | 85/100 | 75/100 | - | 85/100 |
| Praises | - Minimalist interface design provides a fast and distraction-free experience for daily unit conversions
| - | - | - Comprehensive unit conversion categories provide utility for daily professional and personal tasks
- Customizable interface allows users to prioritize frequently used conversion tools for quick access
| - Simplicity and speed of conversion
| - High accuracy and simple interface design make daily unit conversions fast and reliable for users
| - Specialized geometry focus
| - High precision and reliability in construction calculations keep professionals engaged across multiple project types
| - | - Calculation history tape provides reliable verification for long strings of business numbers
|
| Complaints | - Inability to manually reorder unit categories prevents users from prioritizing their most frequent conversions
| - | - | - Lack of automated currency rate updates causes concern regarding calculation accuracy post-update
| - Lack of offline functionality
| - Complex navigation through long lists makes finding specific conversion categories difficult for casual users
| | - Transition from lifetime purchase model to recurring subscription creates significant friction for long-term users
| - | - Widget functionality fails to trigger correctly on iPadOS and iOS devices
|
| Requests | - Manual reordering of unit categories would allow users to prioritize their most frequently used measurements
| - | - | - Implementation of copy and paste functionality to improve workflow efficiency for users
| - Advanced mathematical features
| - Favorite conversions and reverse toggle buttons would reduce repetitive navigation for frequent users
| | - Reintroduction of specific shortcut buttons to improve speed during repetitive construction measurement tasks
| - | - Apple Watch integration requested to enable quick calculations from the wrist
|
| Strategic Intel |
| Strengths | - Minimalist interface design reduces cognitive load for daily tasks
- High-precision rounding logic supports professional-grade utility
- iPad multitasking integration drives power-user retention
| - 400+ unit library provides broad utility for niche engineering segments
- Offline currency conversion ensures functionality in low-connectivity environments
| - Formula-display mechanism provides educational value for students
- Minimalist UI reduces cognitive load for single-task users
| - Customizable interface allows users to hide unused categories, reducing cognitive load
- Integrated calculator and converter workflow consolidates two tools into one session
| - French-specific linguistic library creates a niche barrier against English-centric conversion suites
- High-visibility interface reduces friction for administrative check-filling tasks
| - Multi-language unit library functions as a B2B distribution barrier into international markets
- Offline-first architecture ensures utility in travel environments
- Scientific prefix support targets high-value technical users
| - Specialized geometry library for 15 tank types
- Simplified interface reduces cognitive load
| - Specialized construction-math logic replaces physical hardware [Professional Segment]
- High-precision conversion engine sustains daily utility [Professional Segment]
| - | - Ad-free business model increases long-term user trust
- History tape functionality creates high switching costs for professionals
|
| Weaknesses | - Fixed category order creates navigation friction
- Lack of quick-switch menu between categories
- 0.02 rating gap between iOS and Android platforms
| - Lack of home screen widgets limits daily active usage
- One-time payment model restricts long-term revenue growth per user
| - Zero Android rating volume indicates failed platform adoption
- Lacks home screen widgets compared to category incumbents
| - Manual currency updates cause stale data complaints
- Lack of copy-paste functionality hampers workflow efficiency
| - Ad-supported model creates session churn
- No offline-save capability despite student-demographic reliance on low-connectivity environments
| - Navigation friction caused by long lists
- Lack of fractional imperial units
- Missing pressure measurement types
| - $3.99 iOS price point above category median
- No cloud-save for calculation history
- 0.7★ rating gap between Android and iOS
| - Subscription-only model triggers legacy user churn [Monetization]
- 0.38★ Android-iOS rating gap indicates platform-specific regression [Platform Quality]
| - | - Widget functionality failures erode premium user utility
- Intrusive rating prompts drive negative sentiment
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| Pricing | free | freemium | free | paid | freemium | free | freemium | subscription | free | paid |
| Momentum | Zombie | Zombie | Zombie | - | Maintenance | Maintenance | Maintenance | Active | - | - |
| Update Cadence | 2 versions, ~352d avg | 2 versions, 1 majors/6mo, ~1082d avg | 2 versions, ~107d avg | - | 1 versions, 1 majors/6mo | 2 versions, ~857d avg | 2 versions, ~587d avg | 5 versions | - | - |
